<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>我是一名特工</title>
    <link rel="stylesheet" type="text/css" href="小网页.css">
</head>
<body>
    <div class="top">
        <div class="topcenter">中间部分</div>
    </div>

    <div class="middle"></div>


</body>
</html>